Choose the right injection range
The D25 family is marketed as an 11 GPM water-driven dosing pump. Individual configurations have different maximum operating limits, shown below and in the SEKO datasheet.
0.2–2%
Lower dosing concentration range.
Up to 11 GPM4.4–87 PSI
1–5%
Intermediate dosing concentration range.
Up to 11 GPM4.4–87 PSI
3–10%
Higher dosing concentration range.
Up to 8.8 GPM*4.4–58 PSI
*The 3–10% configuration has a lower manufacturer-rated maximum water flow and operating pressure. Always use the limits for the exact configuration selected.
D25RE performance specifications
| Specification | 0.2–2% (020) | 1–5% (050) | 3–10% (100) |
|---|---|---|---|
| Injection range | 0.2–2% | 1–5% | 3–10% |
| Water flow | 10–2,500 L/h ~0.044–11.0 GPM | 10–2,500 L/h ~0.044–11.0 GPM | 10–2,000 L/h ~0.044–8.8 GPM |
| Operating pressure | 0.3–6 bar ~4.4–87 PSI | 0.3–6 bar ~4.4–87 PSI | 0.3–4 bar ~4.4–58 PSI |
| Concentrate injection | 0.02–50 L/h | 0.1–125 L/h | 0.3–200 L/h |
U.S. customary values are rounded conversions from the manufacturer specifications. Refer to the official PDF for authoritative technical data.
Common technical specifications
| Water temperature | 5–40°C (41–104°F) |
| Maximum concentrate viscosity | 400 cPs at 20°C |
| Maximum suction height | 4 m (approx. 13 ft) |
| Inlet / outlet connections | ¾-inch male BSPT-NPT (per SEKO datasheet) |
| Pump body options | Polypropylene (PP), PVDF |
| Seal options | FPM, EPDM, AFLAS |
| Power | Water-driven; no electrical supply required |
Installation & operating guidance
Protect the pump
Use an appropriate upstream water filter and protect against excessive pressure, flow and water hammer.
Maintain the dosing system
Rinse with clean water as recommended and inspect service parts. The manufacturer recommends replacing dosing seals at least annually.
Adjust safely
Shut off water and fully depressurize the system before adjusting the dosage setting or servicing the pump.
These are selected points from manufacturer guidance, not a substitute for the complete installation instructions and application-specific safety review.
Technical documentation
SEKO Hydrakos D25RE Technical Data Sheet
Manufacturer PDF covering the dosing principle, product specifications, construction materials, model identification, dimensional drawings and installation guidance.
Download Technical Datasheet ↓D7 and D90 technical documents will be added after their development and release. Their product pages are not yet available.